ha12162fp HITACHI, ha12162fp Datasheet - Page 58

• Manufacturer Part Number: ha12162fp
• Description: Dolby C-type Noise Reduction System
• Manufacturer: HITACHI

HA12141NT, HA12142NT, HA12170NT, HA12161FP, HA12162FP
Operation Mode Control
HA12141 series provide fully electronic switching circuits. The function are controlled by DC voltage and
are NR OFF/B/C and PB/REC/MPX.
The switching truth tables are shown in table 2 and table 3.
Table 2 Switching Truth Table (NR OFF/B/C)
Function
NR OFF
B type
C type
Note:
Table 3 Switching Truth Table (PB/REC/MPX)
Function
Play back (Decode mode)
Record (Encode mode)
MPX-OFF
Notes: 1. These functions are available for being open at NR B mode and REC mode.
MPX-off mode means that signal from input amp doesn’t go through the MPX filter, but signal goes
through the SS circuit after being attenuated 3 dB by internal resistor. Refer to figure 2.
Rev.3, Jun. 1999, page 58 of 63
2. MPX-OFF mode control Voltage of HA12170NT is available with range from V
1. These functions are available for being open at NR B mode and REC mode
Single supply
Single supply
0 to 0.4
2.5 to V
0 to V
V
V
V
CC
CC
CC
/2 – 0.5 to V
/2 + 3 to V
– 1 to V
CC
/2 – 3
CC
/2 + 0.5
CC
CC
CC
/2 + 0.5
Split supply
V
–0.5 to 0.5
3 to V
Split supply
V
V
V
EE
EE
EE
CC
to –3
to V
+ 2.5 to 0.5
– 1 to V
CC
EE
+ 0.4
CC
CC
– 2 to V
Unit
V
V
V
Unit
V
V
V
CC
.
Note
*1
Note
*1
*2